Villain is fish

That turn card seems to me good for second barrel (i can make him fold any smaller pair) and gives me backdoor equity ; but on the other side it hits his drawing range too and fishes hate folding (specially with a draw !)

What does hero do?

[converted_hand][hand_history]Poker Stars, $2.70 Buy-in (50/100 blinds, 10 ante) No Limit Hold'em Tournament, 9 Players
Poker Tools Powered By Holdem Manager - The Ultimate Poker Software Suite. View Hand #37934722

MP1: 8,042 (80.4 bb)
Hero (MP2): 10,341 (103.4 bb)
MP3: 19,138 (191.4 bb)
CO: 4,935 (49.4 bb)
BTN: 9,860 (98.6 bb)
SB: 9,890 (98.9 bb)
BB: 9,643 (96.4 bb)
UTG+1: 9,655 (96.6 bb)
UTG+2: 10,750 (107.5 bb)

Preflop: Hero is MP2 with A K
UTG+1 calls 100, UTG+2 folds, MP1 calls 100, Hero raises to 556, 6 folds, MP1 calls 456

Flop: (1,452) 8 8 T (2 players)
MP1 checks, Hero bets 700, MP1 calls 700

Turn: (2,852) Q (2 players)
MP1 checks, Hero ?

don't just call people a fish without explaining what you mean - on it's own it's just meaningless abuse. If you mean V is a loose passive calling station then the worst thing you can do is keep barreling weak hands. Check flop and go from there.

You are right ; yeah i meant one loose guy who never ever folds